2013_March: Compressor Shipping Bracket Removal

RE:Ensuring the Compressor Shipping Brackets
are removed from AIRSYS HVAC units on New Build cell sites AFTER they
are delivered to their site location and PRIOR to bringing the new cell
site on line.

I.
Distribution:

Shelter manufacturers
purchasing AIRSYS HVAC systems

VzW corporate engineering

II.
Description of the issue:

AIRSYS utilizes shipping brackets at the base of each
compressor to secure the compressor firmly for shipment. These brackets are only to prevent the
“bumps” and “jolts” that can occur during shipment from altering the compressor
mounting platform which has been optimized to support the natural vibration of
the compressor during Mechanical Cooling or “Compressor On” periods of
operation. The installation instructions
in the manual call for the removal of these brackets prior to powering up the
HVAC system. For New Builds the brackets
should remain in place until the shelter is delivered to its final location “On
Site”. Once the completed shelter leaves
the shelter manufacturer’s facility the shelter manufacturer can no longer take
responsibility for ensuring these brackets are removed prior to power up. This bulletin details a resolution to ensure
the instructions for removing the bracket are communicated to whomever will be
turning up the HVAC system after the shelter has been delivered to the site.

Open the front cover to locate the
compressor. The two brackets at
the base of the compressor are required for transport only. Loosen the four
bolts, remove the two brackets, and then tighten the four bolts back down to the
base of the compressor.

III. Resolution of the issue:

Placing a sticker (Figure 2) immediately inside the shut
down breaker access panel (as shown in Figure 3.) instructing the reader to
remove the compressor brackets should accomplish the goal of ensuring the
brackets are removed prior to the system being powered up.

ü Ensure ASLLC.2 controller box assembly includes
two Bracket Removal Stickers in the hardware kit for all shipments occurring
after March 18th, 2013.

Shelter OEMs should
do the following:

ü Place the Bracket Removal Stickers immediately
underneath the access panel as shown in Figure 3. This must be done after all
electrical testing has been completed and after the HVAC units are powered off via
their prime power breaker (located behind access panel). This activity should happen prior to the
newly assembled shelters shipping to the customer.h